discuss sexual dimorphism in a human skeleton
Answers
Answer:
Sexual Dimorphism of the Human Skeleton. The human skeleton is not as sexually dimorphic as that of many other primate species, although human female skeletons tend to be smaller and less robust than human male skeletons within a given population. There are also subtle differences between males and females in the morphology of the skull, teeth, longs bones, and pelvis.
Explanation:
Related Questions
A dog pulls on his leash with a 10-newtons force to the left but doesn't move. What is the reaction force?.
Answers
Answer:
10 N tension force to the right
Explanation:
If a dog pulls to the right at a constant force but doesn't move, there is a tension force of equal magnitude in the opposite direction.
This is known by Newton's 3rd Law of Motion which states that for every reaction, there is an equal and opposite reaction.
Therefore, the reaction force is a 10 N tension force to the right.
9. An astronaut is standing on the Moon which has a force of gravity of 2.5 N/Kg. She lifts up a rock that
work done on the rock was 100 J, what distance did the rock move?
has a mass of 20 Kg. If the
a mass of 20 Kg. If the work done on the rock was 100 J what distance did the rock move ?
Answers
The distance moved the rock is determined as 2 m.
What distance did the rock move?
The distance moved the rock is calculated as follows;
P.E = mgh
where;
m is the mass of the rockg is acceleration due to gravityh is the distance moved by the rockh = P.E / mg
h = ( 100 J ) / ( 20 kg x 2.5 N/kg)
h = 2 m
Thus, the distance moved by the rock is a function of gravitational potential energy, which is the energy possessed by a body due to its position above the ground.
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if v= 4.3 + 1.2% and I = 2.1A + 4.5% find the resistance and significant figures
Answers
A sample of a low-density gas is initially at room temperature and has pressure p. The gas is warmed at constant volume until the pressure is 2p. Compared to the initial Celsius temperature of the gas, the final Celsius temperature is
Answers
Answer:
Compared to the initial Celsius temperature of the gas, the final Celsius temperature is greater by a factor of more than 2.
Explanation:
Gay-Lussac's law states that the pressure of a fixed volume of a gas is directly proportional to its temperature. In other words, if the temperature increases, the pressure will increase and if the temperature decreases, the pressure will decrease.
In summary, Gay-Lussac's law is a law that says that when the amount of gas and volume are kept constant, the quotient that exists between the pressure and the temperature will always have the same value:
\(\frac{P}{T}=k\)
Being an initial state 1 and a final state 2, it is true:
\(\frac{P1}{T1} =\frac{P2}{T2}\)
In this case:
P1= pT1= tP2= 2pT2= ?Replacing:
\(\frac{p}{t} =\frac{2p}{T2}\)
Solving:
\(T2=2p*\frac{t}{p}\)
T2= 2*t
Compared to the initial Celsius temperature of the gas, the final Celsius temperature is greater by a factor of more than 2.
d) A tank with dimensions: 3m x 2m x 2m contains water upto its half
pertion. What is the pressure at the base of the tank? (density of water
= 1000 kg/m3, g= 9.8 m/s2)
(Ans: 9800 Pa)
Answers
Answer:
P = 9800 [Pa]
Explanation:
In order to calculate the pressure at the bottom, we must use the following formula.
P = Ro*g*h
where:
P = pressure [Pa] (units of pascals)
Ro = density of the water = 1000 [kg/m³]
g = gravity acceleration = 9.8 [m/s²]
h = height = 1 [m] (because its half of the portion, the full height is 2 m)
P = 1000*9.8*1
P = 9800 [Pa]
Suppoe that a high-energy neutron i travelling at a peed of 18 million m/. Find it energy in MeV (million electron volt (eV))
Answers
The energy of the high energy neutron is 940.51 MeV.
Speed is nothing but the distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity with the SI unit meter/second.
We know that mass of the neutron m₀ = 939.6 MeV/c²
A high energy neutron is travelling at a speed of 18 million m/s.
Given that, v = 1.8 * 10⁷ m/s
The energy of neutron is calculated with the formula, m₀* c²/√(1 - v²/c²)
⇒ 939.6 * (3* 10⁸)²/√[1 - (1.8 * 10⁷)²/(3* 10⁸)²]
⇒ 940.51 MeV
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A paper airplane is thrown with an initial velocity of 2.4 m/s and an angle of 60°. Find the voy
Answers
Initial velocity of 2.4 m/s and an angle of 60°.
The x component is 2.4 m/s cos(60°) = 2.4 m/s (0.5) = 1.2 m/s
The y component is 2.4 m/s sin(60°) = 2.4 m/s (0.866) = 2.08 m/s
What is Initial velocity?Initial velocity is the speed an object has when it starts moving in a certain direction. It is the speed that an object has before any external forces act upon it. Initial velocity is a vector quantity, meaning it has both a magnitude, or size, and a direction. Initial velocity is usually measured in meters per second (m/s). It is important to note that the initial velocity of an object can be different depending on the reference frame from which it is measured.
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The complete question is-
A paper airplane is thrown with an initial vclocity of 2,4 m and angle of 60" Find the Voz: 012m/s 0.62 mn/& 0 1.70 m/8 208 m/$
a metal bar is hanging from a hook in the ceiling when it is suddenly struck by a ball that is moving horizontally (see figure). the ball is covered with glue, so it sticks to the bar. during this collision a metal bar is hanging from a hook in the ceiling when it is suddenly struck by a ball that is moving horizontally (see figure). the ball is covered with glue, so it sticks to the bar. during this collision the angular momentum of the system (ball and bar) is conserved about the hook because only gravity is acting on the system. the angular momentum of the system (ball and bar) is not conserved because the hook exerts a force on the bar. the angular momentum of the system (ball and bar) is conserved about the hook because neither the hook nor gravity exerts any torque on this system about the hook. both the angular momentum of the system (ball and bar) and its kinetic energy are conserved. both the linear momentum and the angular momentum of the system (ball and bar) are conserved.
Answers
The angular momentum of the system (ball and bar) is conserved about the hook because neither the hook nor gravity exerts any torque on this system about the hook.
The rotating inertia of an object or system of objects when they are moving about an axis that may or may not pass through them is described by a property known as angular momentum. The daily rotation of the Earth's axis and its yearly orbital revolution around the Sun give the planet its spin angular momentum. Since angular momentum is a vector quantity, both its magnitude and direction must be determined in order to fully represent it. The angular momentum of an orbiting object is proportional to its linear momentum, which is determined by dividing the mass (m) by the linear velocity (v) and by the perpendicular separation (r) from the axis of rotation.
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1. What accounts for the aircraft carrier having a greater kinetic energy than the orbiting satellite?
A. Mass
B. Speed
C. Mass and speed
2. What accounts for the pitched baseball having a greater kinetic energy than the falling nickel?
A. Mass
B. Speed
C. Mass and speed
3. What accounts for the bumblebee having more kinetic energy than the snail?
A. Mass
B. Speed
C. Mass and speed
4. How much do work would have to be done to the truck starting from rest to give it half the listed kinetic energy.
A. 0 J
B. 2.2*10^3 J
C. 5.7 * 10^5 J
D. 1.1 * 10^6 J
5. How fast would the truck be moving? If it had half the listed kinetic energy?
A. -52km/h
B. 0 km/h
C. 71 km/h
D. 118 km/h
Answers
1. C. Mass and speed
2. B. Speed
3. B. Speed
4. C. 5.7 * 10^5 J
5. C. 71 km/h
A charge of 0. 05 C moves a negative charge upward due to a 2 N force exerted by an electric field. What is the magnitude and direction of the electric field? 0. 03 upward 0. 03 downward 40 upward 40 downward.
Answers
The magnitude of the electric field is 40 N/C, and its direction is downward.
The force exerted by an electric field on a charged particle is given by the equation F = qE, where F is the force, q is the charge, and E is the electric field strength. In this case, the force is given as 2 N and the charge is 0.05 C. Therefore, we can rearrange the equation to solve for the electric field strength: E = F/q = 2 N / 0.05 C = 40 N/C. The negative charge moves upward, which means it experiences a force in the opposite direction. Hence, the electric field must be directed downward. The magnitude of the electric field is 40 N/C, and its direction is downward.
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Emily rides on a horizontal rotating platform of radius r at an amusement park
and moves at a linear velocity, vt = 1 m/s, one third the way from the center to the
outer edge, and a rotational velocity of 2 RPM. How much would her linear and
rotational velocities be if she moves to the outer edge?
Answers
Answer:
Her linear velocity on the outer edge is 3 m/s
Her rotational velocity, is constant at 2 RPM
Explanation:
The given parameters are;
The radius of the rotating platform = r
The linear velocity v(t) = 1 m/s
The position Emily is riding = 1/3 the distance from the center
The rotational velocity = 2 RPM = 2 Revolutions per minute
The formula for angular velocity, ω is given as follows;
ω = θ/t
Where;
θ = The angle rotated
t = The time taken for the rotation
Given that the rotational velocity = 2 RPM
1 revolution = 2·π radians
The angular velocity, ω = 2×π×(2 RPM) = 4·π rad/min = 4·π/60 rad/seconds
ω = 4·π/60 rad/seconds
The linear velocity, v = r₁×θ/t = r₁×ω
Where;
r₁ = 1/3 × r
v = 1 m/s = 1/3 × r × 4·π/60 rad/seconds
∴ r = 1/(1/3 × 4·π/60) = 45/π meters
r = 45/π meters
Therefore her linear velocity, v₂ and her rotational velocity if she moves to the outer edge will be given as follows;
v₂ = r × ω = 45/π × 4·π/60 = 3 m/s
Her linear velocity on the outer edge, v₂ = 3 m/s
Her rotational velocity, remains at 2 RPM.
A lawn mower is pushed with a force of 79 N. If 11,099 J of work are done on mowing the lawn, what is the total distance the lawn mower was pushed? Round your answer to a whole number (no decimal places).
Answers
Answer:
141m
Explanation:
what is motion ??????
Answers
Answer:
In physics, motion is the phenomenon in which an object changes its position with respect to time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed
Explanation:
I got this off internet. Hope it helps!
Work is equivalent to a rate of dissipation of power per unit time
T/F
Answers
Work is equivalent to a rate of dissipation of power per unit time. The given statement is true because work and power are related concepts in the realm of physics, transfer and conversion of energy
Work is the amount of energy transferred by a force acting through a distance, and it is typically measured in joules (J). Power, on the other hand, is the rate at which work is done or the rate at which energy is transferred or converted per unit time, and it is measured in watts (W). One watt is equal to one joule per second (1 W = 1 J/s). In a physical process, when work is done on or by a system, energy is transferred between the system and its surroundings, this energy transfer can take various forms, such as kinetic energy, potential energy, or thermal energy.
The dissipation of power refers to the conversion of useful energy into a form that cannot be easily converted back into work, such as heat or sound. The rate of dissipation of power per unit time is, therefore, equivalent to the rate at which work is done or the rate at which energy is transferred in the system. In summary, the statement "work is equivalent to a rate of dissipation of power per unit time" is true, as work and power are related concepts in the realm of physics, describing the transfer and conversion of energy over time.
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A transformer has 1000 turns on the primary coil.
The voltage applied to the primary coil is 230V a.c,
How many turns are on the secondary coil if the output
voltage is 46 V a.c.?
A)20 B)200 C)2000 D4000 E)8000
Answers
Answer:
200
Explanation:
Given parameters:
Number of turns in primary coil = 1000 turns
Primary voltage = 230V
Secondary voltage = 46V
Unknown:
Number of turns in secondary coil = ?
Solution:
To solve this problem, we have to use the expression for solving problems related with transformers;
\(\frac{Vs}{Ns}\) = \(\frac{Vp}{Np}\)
Vs is the secondary voltage
Ns is the number of secondary turns
Vp is the primary voltage
Np is the number of primary turns
Now insert the parameters and solve;
\(\frac{46}{Ns}\) = \(\frac{230}{1000}\)
46 x 1000 = 230Ns
Ns = 200
Which statement accurately describes radioactive dating?
a. Geologists use only one type of radioactive dating.
b. Geologists compare parent and daughter elements to determine rock type.
c. Geologists will measure how stable multiple parent elements can decay into multiple daughter elements.
d. Geologists compare the observed abundance of naturally occurring radioactive isotopes and their decay products using decay rates.
Answers
Answer: C. is the answer
Explanation:
Answer:
D
Explanation:
took the test :D
What makes cells. Dont answer that I already know what it is. I just wanted to give people some points. lol have a nice day.✌
Answers
Thank you for the pointsss
It is the obligation of researchers to review and comment on the research of other researchers. Please select the best answer from the choices provided T F.
Answers
Thorough inquiry and analysis of materials and sources to establish facts and reach new findings are known as resarch. False is the best answer from the choices provided
What is research?Thorough inquiry and analysis of materials and sources to establish facts and reach new findings.
It is false that researchers are required to evaluate and remark on the work of other researchers. It is not their responsibility - they do not have to do it,
But they may if they want to and if the author allows them to. However, they are not compelled to do so by law or anything else. They do it simply out of goodwill or genuine interest.
Hence False is the best answer from the choices provided.
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Answer: false
Explanation:
PLEASE HELP A car drives 5369 m in a straight line, and then backs the car up 8746 m. The total time the car was in motion was 134 s. What was the velocity of the car?
Answers
A 2 row table with 7 columns. The first row is labeled Component with entries A Subscript x Baseline, A Subscript y Baseline, B Subscript x Baseline, B Subscript y Baseline, C Subscript x Baseline, C Subscript y Baseline. The second row is labeled Magnitude in kilometers with entries 1.6, 2.8, 3.9, 6.4, 1.2, 0.7. Three vectors are drawn on the x y plane. Vector A is drawn southwest, vector B northeast, and vector C southeast.
The image shows the displacement of a motorboat. The data table shows the magnitudes of the components of each displacement vector.
What is the value of Rx?
km
What is the value of Ry?
km
Answers
Answer:
rx=3.5 ry=2.9
Explanation:
i did it and i got them right
Answer:
Rx: 3.5km
Ry: 2.9km
Explanation:
Which of the following is an example if harmonic motion?
Answers
Answer:
"A pendulum swinging back and forth" is an example of harmonic motion
X = Xo cos ω t
Explains the back and forth motion of the pendulum
A thin lens is comprised of two spherical surfaces with radii of curvatures of 34.5 cm for the front side and -26.9 cm for the back side. The material of which the lens is composed has an index of refraction of 1.66. What is the magnification of the image formed by an object placed 42.6 cm from the lens?
Answers
The magnification of the image formed by the lens is -0.982.
To determine the magnification of the image formed by the lens, we can use the lens formula:
1/f = (n - 1) * (1/r1 - 1/r2)
Where f is the focal length of the lens, n is the refractive index of the lens material, r1 is the radius of curvature of the front surface, and r2 is the radius of curvature of the back surface.
Given that the radii of curvature are 34.5 cm and -26.9 cm, and the refractive index is 1.66, we can substitute these values into the lens formula to calculate the focal length.
Using the lens formula, we find that the focal length of the lens is approximately 13.54 cm.
The magnification of the image formed by the lens can be determined using the magnification formula:
m = -v/u
Where m is the magnification, v is the image distance, and u is the object distance.
Given that the object is placed 42.6 cm from the lens, we can substitute this value and the focal length into the magnification formula to calculate the magnification.
Substituting the values, we find that the magnification of the image formed by the lens is approximately -0.982.
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In 2 - 3 sentences, explain the difference in Kinetic energy and Potential energy.
Answers
The main difference between Kinetic energy and Potential energy is that kinetic energy refers to movement while potential energy refers to storage.
What are Kinetic energy and Potential energy?Kinetic energy is a type of energy in motion or energy in movement such as a turbine (mechanical energy), while Potential energy refers to the energy that is stored to be used when required (e.g. chemical bonds of foods).
Therefore, with this data, we can see that Kinetic energy is used as movement, while Potential energy is stored to be used in the future.
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If a body of mass 4 kg moves at a velocity of 25 m/s and has a completely inelastic collision with a body of mass 10 kg, the final velocities of both the bodies is 14 m/s. Calculate the initial velocity of the body of mass 10 kg.
Answers
We are given the following information about an inelastic collision.
Mass of 1st object = 4 kg
Mass of 2nd object = 10 kg
Initial velocity of 1st object = 25 m/s
Final velocity of both objects = 14 m/s
Initial velocity of 2nd object = ?
In an inelastic collision, the momentum is conserved but the kinetic energy is not conserved.
Recall that the total momentum is conserved and given by
\(m_1u_1+m_2u_2=(m_1+m_2)v_2\)Let us substitute the given values and solve for initial velocity of the body (u2)
\(\begin{gathered} m_1u_1+m_2u_2=(m_1+m_2)v_2 \\ 4\cdot25+10\cdot u_2=(4+10)\cdot14 \\ 100+10\cdot u_2=196 \\ 10\cdot u_2=196-100 \\ 10\cdot u_2=96 \\ u_2=\frac{96}{10} \\ u_2=9.6\; \frac{m}{s} \end{gathered}\)Therefore, the initial velocity of the body of mass 10 kg is 9.6 m/s
A laser emits light with a frequency of 4. 75×1014 s−1. What is the wavelength of this radiation, in nm?.
Answers
A Final statement or concluding statement
The equation that relates wavelength, frequency, and speed of light is
c=λ × ν
To find wavelength, λ = c / f
λ = wavelength in meters
ν = frequency in Hertz (Hz) or 1s or \(s^{-1}\).
= 3 ×\(10^{8}\) m/s / 4. 75 × \(10^{14}\) \(s^{-1}\)(Using velocity of light as 3 x 108 m/s)
= \(6.3\)×\(10^{-7}\)m
= \(6.3\) × \(10^{2}\) nm
How is wavelength related to radiation?Electromagnetic radiation is an electric and magnetic disturbance that travels at the speed of light through space. It has no mass or charge and travels in packets of radiant energy known as photons or quanta.Radio waves and microwaves, as well as infrared, ultraviolet, gamma, and x-rays, are examples of EM radiation. Electromagnetic radiation moves at a constant speed in the form of a waveform.
The relationship of velocity to wavelength and frequency reveals the wave characteristics of EM radiation.
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thermal energy is transferred between objects only when they have different ______.
Answers
Thermal energy is transferred between objects only when they have different temperatures.
The movement of atoms and molecules within a substance is a form of energy known as thermal energy.
When two objects are in contact, or even in proximity, the atoms and molecules in the hotter object collide with those in the colder object.
Because of these effects, a portion of the kinetic energy from the more sizzling object is moved to the colder object, raising the temperature of the previous and bringing down the temperature of the last option.
A material's thermal conductivity — an estimation of how well it moves heat — decides how rapidly heat is moved between various sorts of materials.
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Newton's discovery concerning how fast an object will change speed is the:
1st Law
3rd Law
2nd Law
Universal Gravitation
Answers
Answer:
I think its the second law..
Explanation:
Answer:
its the second law.
hope this helps! :)
2. Does the emphasis on safety vary for each style of vehicle? In what way?
3. Does the level of safety equipment vary with price of vehicle?
4. What effects will a vehicle’s top speed, power and acceleration likely to have on safety? Is this considered in the advertisements?
WILL MARK BRAINLIEST IF CORRECT
Answers
Answer:
Emphasis on public safety can surely reduce the risk for various groups of population
1. Proper education and training must be provided to make them aware of the risks and how they can manage those risks.
2. Proper rules and regulation must be made and strictly followed for example traffic rules so as to avoid accidents.
3. Disaster management teams should to formed to ensure minimal loss of humans and resources during any natural calamity.
4.Eradication of poverty and illiteracy should be priority so as to ensure people focus on more important issues in life rather than involve themselves in trivial things.
Explanation:
Niels Bohr theorized that as an electron's energy increased, its orbit:
A. changed direction.
B. remained the same.
c. moved away from the atom's nucleus.
D. moved closer to the atom's nucleus.
SUBMIT
Answers
Answer:
Moved away from the nucleus
1. What is the claim made by the Big Bang theory regarding the creation of the universe?
Answers
Answer:
Explanation:
The big bang theory explained that the universe started as a single entity which was created by massive explosion and it create most of the matter i.e galaxies were moving away from the universe in all directions with great speed which then cause massive explosion and bring about cosmos creation.